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Many helmets have chin straps to hold them on.

One design uses a split chin-strap, where the strap splits into two forming a cup shape, one going just below the lower lip and one under the chin.

Original file public domain https://commons.wikimedia.org/wiki/File:ACH_005.jpg edited to focus on the chin cup strap

In my opinion, this is a more comfortable design as the chin strap is against the chin bone instead of pressing against the fleshy underside of the lower jaw.

OP's work, from https://i.imgur.com/70lEdtX

I found a single link http://www.usyouthsports.org/images/CPSC_Hangman_s_4_point_chin_strap.pdf which claims that this design is safer for bike helmets as it may reduce some cases of strangulation in case a "yanking" force is applied to the helmet.

  • Were there any other studies done on chin strap design like this for bike helmets?
  • Is this design safer?
  • Are there any bike helmets actually available with this chin strap ?
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    Can a helmet strap actually strangle you? I imagine you’d rip the anchors out of the helmet before that happens. – MaplePanda Oct 9 '20 at 15:18
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    @MaplePanda I found these after a cursory google search cyclehelmets.org/1227.html and helmets.org/playgrou.htm The cases are rare, though there are indications that this is a possibility (atleast during some non-cycling activities wearing the helmet) – user80551 Oct 9 '20 at 15:26
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    @MaplePanda I also found out this report helmets.org/chinstrp.pdf which establishes the release force of current helmet straps at >1000N which did not release during any of their tests. – user80551 Oct 9 '20 at 15:34
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    The "purpose" of the harness is so when you hang a few pounds of optical equipment off the front of the helmet it doesn't pitch forward and dig a regular chin strap into your neck. The front of the chin is connected to the strap across the nap of the neck for stability/prevent that strap from riding up. – Affe Oct 9 '20 at 20:27
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    @Criggie The rewording is much better, but maybe a little less blur around the cup showing the "right under the lower lip" concept would have been better. The current image doesn't illustrate the positioning of the strap easily IMO. – user80551 Oct 10 '20 at 23:58

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